src/utils/mediaTypes.js

const AUDIO_MIME = {
  mp3: "audio/mpeg",
  wav: "audio/wav",
  flac: "audio/flac",
  opus: "audio/opus",
  pcm16: "audio/L16"
};

const IMAGE_MIME = {
  jpg: "image/jpeg",
  jpeg: "image/jpeg",
  png: "image/png",
  webp: "image/webp",
  gif: "image/gif"
};

export function audioMimeType(format) {
  return AUDIO_MIME[format] ?? "application/octet-stream";
}

export function imageMimeType(format) {
  return IMAGE_MIME[format] ?? "image/png";
}

export function extensionFromMimeType(mimeType) {
  const mimeMap = {
    "audio/mpeg": "mp3",
    "audio/wav": "wav",
    "audio/flac": "flac",
    "audio/opus": "opus",
    "audio/L16": "pcm16",
    "image/jpeg": "jpg",
    "image/png": "png",
    "image/webp": "webp",
    "image/gif": "gif"
  };

  return mimeMap[mimeType] ?? "bin";
}